Do you have both multi engine and single engine commercial license with instrument rating on your Canadian License ?
if you do then you can get away with it . Even candidates from IGRUA and NFTI dont do the 250 and 120 on the multi because they already do it on the Single .
Since you are applying for both you can do your multi skill test in Canada and the single engine skill test in India .
For the multi you have to log
4hours Dual by day
3 hours Dual by night ( within the 7 hours log some instrument hood time also with practice instrument approaches )
1 hour skill test by day with 3 t/o & ldg
1 hour skill test by night with 3 t/o & ldg
1 hour IR check with 2 approaches ( 1 hour under the hood . So total flight time will be 1.2 or more )
Before you do any of the training you need to undergo atleast 20 hours of ground school on the particular aircraft type( make sure you get a certificate that says specifically 20 hours ) . Then you have to undergo a specific exam on type conducted by the Civil Aviation Authority or by the flight school ( in case of countries like FAA or TC where open rating is given for aircraft below 5700kg )
You have to obtain 70% or more in the written exam . Ask the flight school to preserve the original answer sheet as the DGCA might want to take a look at it .